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https://bugzilla.mozilla.org/show_bug.cgi?id=339494
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<head>
  <title>Test for Bug 339494</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=339494">Mozilla Bug 339494</a>
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<div id="content" style="display: none">
  <div id="d" />
  <div id="s" />
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<pre id="test">
<script class="testbody" type="text/javascript">

/** Test for Bug 339494 **/

  var d = document.getElementById("d");
  
  d.setAttribute("hhh", "testvalue");

  document.addEventListener("DOMAttrModified", removeItAgain, false);
  d.removeAttribute("hhh");
  document.removeEventListener("DOMAttrModified", removeItAgain, false);

  function removeItAgain()
  {
    ok(!d.hasAttribute("hhh"), "Value check 1",
       "There should be no value");
    isnot(d.getAttribute("hhh"), "testvalue", "Value check 2");
    document.removeEventListener("DOMAttrModified", removeItAgain, false);
    d.removeAttribute("hhh");
    ok(true, "Reachability", "We shouldn't have crashed");
  }
  
  var s = document.getElementById("s");
  
  s.setAttribute("ggg", "testvalue");

  document.addEventListener("DOMAttrModified", compareVal, false);
  s.setAttribute("ggg", "othervalue");
  document.removeEventListener("DOMAttrModified", compareVal, false);

  function compareVal()
  {
    ok(s.hasAttribute("ggg"), "Value check 3",
       "There should be a value");
    isnot(s.getAttribute("ggg"), "testvalue", "Value check 4");
    is(s.getAttribute("ggg"), "othervalue", "Value check 5");
  }

</script>
</pre>
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